editors, Subroto Roy and William E. James
Sage Publications, 1992
Buku Teks
Sage Publications, 1992
Buku Teks
Hanson, A.H.
Oxford University Press, 1966
Buku Teks
Rosen, George, author
University California Press , 1966
Buku Teks
Woytinsky, W.S.
Harper & Brothers, 1957
Buku Teks